package java51_17;

public class DouTest {

	public static void main(String[] args) {
		double d = 3.6 / 0.0;
		System.out.println(d);
		// Double d2 = null;
		int max = Integer.MIN_VALUE;
		int m2 = -max;

		System.out.println("m2 is :" + m2);
		// max++;// 0111111111111
		System.out.println("max is" + max);
		// a +(-a)!=0

		System.out.println(">>>>>>>>>>>>>>.");
		Runtime r = Runtime.getRuntime();// 运行时
		System.out.println("cpu:" + r.availableProcessors());
		System.out.println("内存：" + r.totalMemory());
		System.out.println("剩余：" + r.freeMemory());
	}
}
